Commit 5f478adf authored by Benjamin Berg's avatar Benjamin Berg Committed by Johannes Berg
Browse files

wifi: cfg80211: generate an ML element for per-STA profiles 



The specification says that this information should not be explicitly
included in the per-STA profile. However, we need this information
readily available in the BSS for userspace and also internally when
associating. As such, append the appropriate element before
adding/updating the BSS.

Signed-off-by: default avatarBenjamin Berg <benjamin.berg@intel.com>
Signed-off-by: default avatarMiri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20231211085121.abde63d9cc6d.I3d346be0f84f51dccf4f4f92a3e997e6102b9456@changeid


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent f6289e5d

net/wireless/scan.c

+31 −0
Original line number Diff line number Diff line
@@ -2621,6 +2621,7 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy, 
	const struct element *elem;

	struct cfg80211_mle *mle;

	u16 control;

	u8 ml_common_len;

	u8 *new_ie;

	struct cfg80211_bss *bss;

	int mld_id;
@@ -2651,6 +2652,8 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy, 
	    !(control & IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP))

		return;



	ml_common_len = ml_elem->variable[0];



	/* length + MLD MAC address + link ID info + BSS Params Change Count */

	pos = ml_elem->variable + 1 + 6 + 1 + 1;
@@ -2767,6 +2770,34 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy, 
		if (!data.ielen)

			continue;



		/* The generated elements do not contain:

		 *  - Basic ML element

		 *  - A TBTT entry in the RNR for the transmitting AP

		 *

		 * This information is needed both internally and in userspace

		 * as such, we should append it here.

		 */

		if (data.ielen + 3 + sizeof(*ml_elem) + ml_common_len >

		    IEEE80211_MAX_DATA_LEN)

			continue;



		/* Copy the Basic Multi-Link element including the common

		 * information, and then fix up the link ID.

		 * Note that the ML element length has been verified and we

		 * also checked that it contains the link ID.

		 */

		new_ie[data.ielen++] = WLAN_EID_EXTENSION;

		new_ie[data.ielen++] = 1 + sizeof(*ml_elem) + ml_common_len;

		new_ie[data.ielen++] = WLAN_EID_EXT_EHT_MULTI_LINK;

		memcpy(new_ie + data.ielen, ml_elem,

		       sizeof(*ml_elem) + ml_common_len);



		new_ie[data.ielen + sizeof(*ml_elem) + 1 + ETH_ALEN] = link_id;



		data.ielen += sizeof(*ml_elem) + ml_common_len;



		/* TODO: Add an RNR containing only the reporting AP */



		bss = cfg80211_inform_single_bss_data(wiphy, &data, gfp);

		if (!bss)

			break;